Max put all of his physical, mental, emotional, psychological, supernatural strength into banging his fist containing the inferno spell compressed to maximum onto the head of his sword placed into the dragon's head.
*FRRRBOOOM*
When Max's compression was finally released, it blasted the dragon's head so hard that even a god was forced to make a decline in its flight path as its neck muscles were not strong enough to resist the force of the attack.
The single scale under attack was heated to such a high degree alongside Max's epic grade sword that the sword began to slide deeper and deeper towards the dragon's brain.
Max felt the blade sinking deeper and deeper and he pushed it more and more with all his might as his wrist bone literally broke from the stress but in his semi-madness state he still kept pushing.